Well, I'm not trying to boast, but my tree currently stands at 6173 people

Why ? Various reasons.....
a) When I started researching my wife's tree, I (foolishly) continued her line back from her entry on my tree

b) Because I'm exploring every branch line on my paternal side, to try to prove whether the many people of the same surname (and often the same profession) living in the same hamlet as my g.g. grandfather were actually his relatives, and
c) to try to establish where the family originated.
My tree is on Ancestry, and is visible to all, and I don't really mind who uses the information from it. As far as I'm concerned, genealogical research is about sharing information.
However....... now and again I have to play "What if ?"..... quite often putting an 'educated guess' in, which quite often brings up some promising suggested matches in Ancestry. Although I always put notes saying things like 'educated guess, cannot prove', this is often missed by people who take it as verbatim, and then complain because I've allegedly misled them. So now, I have a separate small private tree which is not found by Ancestry's search engines, where I can try out my "What if's' to my heart's content. I also cannot afford to purchase certificates for the people in every branch line that I explore, so I can't vouch for people in the 'outer reaches' of my tree, although I always do as much as I can where the budget allows. Sometimes it's hard to explain to people that I do my research for my benefit, and my entertainment, and my enjoyment, when they complain that they have been misled by my data.
Even though, of course, the onus of proof is always with the recipient of information, not the donor
